Adaptive Transmit Power Allocation Scheme for V-BLAST System under Imperfect Channel State Information
We propose an adaptive transmit power allocation (ATPA) scheme for vertical Bell laboratories layered space–time (V-BLAST) system in the presence of channel state information (CSI) imperfection.The proposed ATPA scheme is aimed at minimizing the bit error rate (BER).At the transmitter,subjected to the total transmit power constraint ,the proposed ATPA scheme is used to allocate proper power for every sub-stream based on imperfect channel state information (I-CSI) and the statistical characteristic of channel estimation errors.At the receiver the modified minimum mean square error (MMSE) detector which takes into account the errors of channel estimation is used to remove the co-antenna interference (CAI) in order to improve BER performance further.Simulation results show that the proposed ATPA algorithm is effective for VBLAST system under imperfect CSI,the BER performance is better than that with equal power allocation.Moreover,corresponding capacity is approximate equal to that of equal power allocation scheme.
Multiple-Input Multiple-Output (MIMO) Adaptive Transmit Power Allocation (ATPA) Vertical Bell Laboratories Layered Space–Time(V-BLAST) Imperfect Channel State Information(I-CSI)
CHEN Xiao-min XU Da-zhuan YU Xiang-bin
College of Information Science and Technology,Nanjing University of Aeronautics &Astronautics,Nanjing,210016,China
国际会议
昆明
英文
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）